freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-an.../basic-javascript/logical-order-in-if-else-st...

114 lines
2.2 KiB
Markdown
Raw Normal View History

---
id: 5690307fddb111c6084545d7
title: Logical Order in If Else Statements
challengeType: 1
videoUrl: 'https://scrimba.com/c/cwNvMUV'
forumTopicId: 18228
---
## Description
<section id='description'>
Order is important in <code>if</code>, <code>else if</code> statements.
The function is executed from top to bottom so you will want to be careful of what statement comes first.
Take these two functions as an example.
Here's the first:
```js
function foo(x) {
if (x < 1) {
return "Less than one";
} else if (x < 2) {
return "Less than two";
} else {
return "Greater than or equal to two";
}
}
```
And the second just switches the order of the statements:
```js
function bar(x) {
if (x < 2) {
return "Less than two";
} else if (x < 1) {
return "Less than one";
} else {
return "Greater than or equal to two";
}
}
```
While these two functions look nearly identical if we pass a number to both we get different outputs.
```js
foo(0) // "Less than one"
bar(0) // "Less than two"
```
</section>
## Instructions
<section id='instructions'>
Change the order of logic in the function so that it will return the correct statements in all cases.
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>orderMyLogic(4)</code> should return "Less than 5"
testString: assert(orderMyLogic(4) === "Less than 5");
- text: <code>orderMyLogic(6)</code> should return "Less than 10"
testString: assert(orderMyLogic(6) === "Less than 10");
- text: <code>orderMyLogic(11)</code> should return "Greater than or equal to 10"
testString: assert(orderMyLogic(11) === "Greater than or equal to 10");
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function orderMyLogic(val) {
if (val < 10) {
return "Less than 10";
} else if (val < 5) {
return "Less than 5";
} else {
return "Greater than or equal to 10";
}
}
orderMyLogic(7);
```
</div>
</section>
## Solution
<section id='solution'>
```js
function orderMyLogic(val) {
if(val < 5) {
return "Less than 5";
} else if (val < 10) {
return "Less than 10";
} else {
return "Greater than or equal to 10";
}
}
```
</section>